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arch: improve definition of gcc mtune, mcpu, etc.

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As suggested by Yann E. Morin, there is a better way than our current
big Config.in.common to define the gcc mtune, mcpu, march,
etc. values. We can split the setting of those values in each
architecture file, which makes a lot more sense.

Therefore, the Config.in file now creates empty kconfig variables
BR2_ARCH, BR2_ENDIAN, BR2_GCC_TARGET_TUNE, BR2_GCC_TARGET_ARCH,
BR2_GCC_TARGET_ABI and BR2_GCC_TARGET_CPU. The values of those
variables are set by the individual Config.in.<arch> files. This is
possible because such files are now only conditionally included
depending on the top-level architecture that has been selected.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
This commit is contained in:
Thomas Petazzoni
2012-11-15 03:53:48 +00:00
committed by Peter Korsgaard
parent 53adfc5f49
commit 44c04a2b4a
13 changed files with 361 additions and 249 deletions
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21
arch/Config.in.m68k Normal file
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config BR2_ARCH
default "m68k" if BR2_m68k
config BR2_ENDIAN
default "BIG"
config BR2_GCC_TARGET_TUNE
default 68000 if BR2_m68k_68000
default 68010 if BR2_m68k_68010
default 68020 if BR2_m68k_68020
default 68030 if BR2_m68k_68030
default 68040 if BR2_m68k_68040
default 68060 if BR2_m68k_68060
config BR2_GCC_TARGET_ARCH
default 68000 if BR2_m68k_68000
default 68010 if BR2_m68k_68010
default 68020 if BR2_m68k_68020
default 68030 if BR2_m68k_68030
default 68040 if BR2_m68k_68040
default 68060 if BR2_m68k_68060